You hear worse down a pub on a friday/saturday night.
You ban someone for life for saying they are going to knock you out and drop the c bomb. Where do you stop? Does Calvin Andrew get banned for life for trying to knock someone out? Do you ban someone for life for headbutting someone? Ban someone for life because they broke someones leg in a bad tackle?
I'd say they are worse than being called a name and being threatened to be knocked out. Football lets killers and rapists back in and people want to ban someone for life for threatening to hit someone?